As I said, I've had quite a few friends who have used smokeless tobacco, especially on the football team. I was heavily involved with that in high school. Starting in grade 9 and being in grade 11 or grade 12, after only three or four years of using during their high school years, at least three of my friends had precancerous cells, leukoplakia, forming on their lips where they stuck their chew. Because the tobacco is absorbed through the mucous membrane in the mouth, the cancer does tend to show up more quickly, from what I understand. It is quite dangerous, and it does do significant damage when they have to remove that cancer.
